SarkariPYQ

SSC CGL 2020 PYQ — Question 69

SSC CGL - 3rd March 2020 Shift 1 • Quantitative Aptitude • Q69

Back to paper

Out of 6 numbers, the sum of the first 5 numbers is 7 times the 6th number. If their average is 136, then 6th number is:

Show answer & explanation

Correct answer: B

Explanation

The correct answer is Option 2 i.e. 102

Application

Given 

Average = 136

So,

the sum of all 6 numbers = 816

According to question:

The sum of (1st to 5th) numbers = 7 times of 6th number

Now,

Let 6th number is x

So,

⇒ 7x + x = 816

⇒ 8x = 816

⇒ x = 102

Hence,

6th number is 102